How soon after rebuild for the rolling road

[snoopy64]

As per title …how many miles in is it time to go for a rolling road setup?

[Markus]

Hello,

It generally depends on a number of factors, such as the quality of the roads and personal preferences.

[GraemeC]

Sooner the better really. Also depends on how confident you are on its initial fuel and ignition set-up.
I’d knock the cam in for 20 mins, change the oil.
Drive it using all the rev range and not letting it labour for 100-200 miles, change the oil.
Get it on a rolling road.
Then drive it properly
And excuse in another 1000 miles whether it would benefit from another wiser to the rollers

[mk1]

I usually get a couple of hundred miles on them before a trip to the dyno. Never had any issues, but I do always say if a car has only got a few miles on it & don't expect a big "Power Run". Getting it set up right is what is important.

[Polarsilver]

SMMC Colin will ask is it a new Engine & he will set up your new build engine as applicable without full power runs .. i go with any fresh engine asap & get it on the rollers running correctly for my piece of mind.. return as & when for the full setup.

[snoopy64]

Brilliant! thanks for the advice, its running nicely, but a final check and tweak would be good...

[Peter Laidler]

If it is running well, like you say, no coughs or splutters, starts well, plugs all a good grey colour, then I'd leave it. I'm always aware of the amount of people, even on this forum, who have been dissatisfied with the running of their car after the rolling road tests. Including me, with an almost still new 2000 RC Sport!

[Thorp]

I think it rather depends on the spec.
If standard I would agree, but with anything else it’s important to get the fuelling right. Particularly at the top end of the Rev range, you don’t want it leaning out.
One of my cars ran very well (1275 +60, sw10 cam etc) but on the rollers (a few years ago - Peter Lander at Sigma Engineering) it showed it needed a bit more fuel. I wouldn’t have picked that up at home.

[Herbert]

I took my car toe Jon Lee's rolling road when Peter Baldwin was there. His way of running an engine was to hold it at 2000 rpm for 10 minutes until the engine came up to temperature. He then told me that as soon as I got back home (90 miles) change the engine oil and oil filter. The worst thing to do to an engine when running it in was to make it labour. That was 13 years ago and the engine still runs 80 psi while running and 30 at idle.